Battery module and battery pack including the same

ABSTRACT

The battery pack according to one embodiment of the present disclosure includes: a lower pack housing including a plurality of module regions; a thermally conductive resin layer located in the module region; a battery module mounted on the module region and located on the thermally conductive resin layer; and an upper pack housing for covering the battery module, wherein the battery module comprises a battery cell stack in which a plurality of battery cells are stacked, and the battery cell stack directly contacts the thermally conductive resin layer, wherein the battery cell stack includes cooling fins located between battery cells adjacent to each other among the plurality of battery cells, and wherein the end portion of the cooling fin comes into contact with the thermally conductive resin layer.

CROSS CITATION WITH RELATED APPLICATION(S)

This application is a National Phase entry pursuant to 35 U.S.C. § 371of International Application No. PCT/KR2021/002278, filed on Feb. 24,2021, and claims priority to and the benefit of Korean PatentApplication No. 10-2020-0078511 filed on Jun. 26, 2020 in the KoreanIntellectual Property Office, the disclosures of which are incorporatedherein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to a battery module and a battery packincluding the same, and more particularly, to a battery module havingimproved cooling performance and a battery pack including the same

BACKGROUND ART

As technology development and demands for mobile devices increase, thedemand for batteries as energy sources is rapidly increasing. Inparticular, a secondary battery has attracted considerable attention asan energy source for power-driven devices, such as an electric bicycle,an electric vehicle, and a hybrid electric vehicle, as well as an energysource for mobile devices, such as a mobile phone, a digital camera, alaptop computer and a wearable device.

Small-sized mobile devices use one or several battery modules for eachdevice, whereas middle- or large-sized devices such as vehicles requirehigh output power and large capacity. Therefore, a middle or large-sizedbattery module in which a large number of battery cells are electricallyconnected is used.

Preferably, the middle or large-sized battery module is manufactured soas to have as small a size and weight as possible. For this reason, aprismatic battery, a pouch-type battery or the like, which can bestacked with high integration and has a small weight to capacity ratio,is usually used as a battery cell of the middle or large-sized batterymodule. Meanwhile, in order to protect the battery cell stack fromexternal impact, heat or vibration, the battery module may include amodule frame in which a front surface and rear surface are opened tohouse the battery cell stack in an internal space.

FIG. 1 is an exploded perspective view of a battery module in a relatedart. FIG. 2 is a perspective view showing a state in which thecomponents constituting the battery module of FIG. 1 are combined. FIG.3 is a cross-sectional view taken along the cutting line A-A of FIG. 2 .

Referring to FIGS. 1 to 3 , the battery module 10 in a related artincludes a battery cell stack 12 in which a plurality of battery cells11 are stacked in one direction, a module frame 20 for housing thebattery cell stack 12, an end plate 15 for covering the front and rearsurfaces of the battery cell stack, and busbar frames 13 formed betweenthe end plate 15 and the front and rear surfaces of the battery cellstack 12. The module frame 20 includes a lower frame 30 for covering thelower and both side surfaces of the battery cell stack 12, and an upperplate 40 for covering the upper surface of the battery cell stack 12.The battery module 10 can transfer heat generated in the battery cellstack 12 to the outside of the battery module 10 because a thermallyconductive resin layer 31 is coated onto the bottom surface of the lowerframe 30 that covers the lower portion of the battery cell stack 120.

At this time, the thermally conductive resin layer 31 transfers heatgenerated in the battery cell stack 12 to the outside of the batterymodule 10. However, in this case, as heat generated in the battery cellstack 12 is transferred in the order of the thermally conductive resinlayer 31, the lower frame 30, and a heat sink (not shown) located on thelower surface of the lower frame 30, the battery cell stack 12 isindirectly cooled. Further, since there is no separate cooling means foreach of the battery cells of the battery cell stack 12, the coolingdeviation between the battery cells becomes severe. In particular, theoutermost battery cell of the battery cell stack 12 is located on theouter side compared to the center battery cell to thereby reduce theheat transfer path, whereby the battery module 10 in a related art leadsto the severity of the cooling deviation between the outermost batterycells and the central battery cells.

In particular, considering that the temperature of the battery cell 11is one of the factors that limits the output of the battery, theseverity of the cooling deviation between the battery cells 11 generatedin the battery cell stack 12 is highly likely to limit the output of thebattery in an earlier stage and thus, there is a need to improve theabove.

The background description provided herein is for the purpose ofgenerally presenting context of the disclosure. Unless otherwiseindicated herein, the materials described in this section are not priorart to the claims in this application and are not admitted to be priorart, or suggestions of the prior art, by inclusion in this section.

DETAILED DESCRIPTION OF THE INVENTION Technical Problem

It is an object of the present disclosure to provide having improvedcooling performance and a battery pack including the same.

The objects of the present disclosure are not limited to theaforementioned objects, and other objects which are not described hereinshould be clearly understood by those skilled in the art from thefollowing detailed description and the accompanying drawings.

Technical Solution

According to one embodiment of the present disclosure, there is provideda battery pack comprising: a lower pack housing including a plurality ofmodule regions; a thermally conductive resin layer located in each ofthe plurality of module regions; a battery module mounted on each of theplurality of module regions and located on the thermally conductiveresin layer; and an upper pack housing for covering the battery module,where the battery module includes a battery cell stack having aplurality of battery cells, and the battery cell stack directly facesthe thermally conductive resin layer, where the battery cell stackincludes cooling fins, and each of the cooling fins is located betweentwo battery cells adjacent to each other among the plurality of batterycells, and wherein the end portion of the cooling fin comes into contactwith the thermally conductive resin layer. The upper and lower surfacesand both side surfaces of the battery cell stack included in the batterymodule may include exposed areas, the lower surface of the battery cellamong the exposed areas stack may face the thermally conductive resinlayer, and a direction in which the lower surface of the battery cellstack may face the thermally conductive resin layer, and a direction inwhich the battery cells are stacked may be perpendicular to each other.

The battery pack may further include at least one adhesive layer locatedbetween each of the cooling fins and the battery cell adjacent thereto,and the both side surfaces of the cooling fin may be fixed to thebattery cell by the adhesive layer. The adhesive layer may include atleast one stripe-shaped adhesive portion, and the adhesive portion mayextend in a direction perpendicular to the stacking direction of thebattery cell stack. The end portion of the cooling fin may be fixed tothe thermally conductive resin layer.

The battery module may further include fixing members located at an endportion of the battery cell stack. The fixing member may surround foursurfaces of the battery cell stack. The fixing member may be arrangedalong the end portion of the battery cell spaced apart from the adhesivelayer. The cooling fin may be a plate material including aluminum. Thebattery module may be mounted on the thermally conductive resin layer,and the end portion of the cooling fin may come into contact with theupper surface of the thermally conductive resin layer.

The battery pack may further include a plurality of partition wallspartitioning the plurality of module regions, and a surface of anoutermost battery cell among battery cells included in the battery cellstack and the partition wall may face each other. The density of thecooling fins formed on the outer peripheral portion of the battery cellstack may be higher than the density of the cooling fins formed in thecentral portion of the battery cell stack.

According to another embodiment of the present disclosure, there isprovided a device comprising the above-mentioned battery pack.

According to another embodiment of the present disclosure, there isprovided a battery module including: a battery cell stack having aplurality of battery cells, where the battery cell stack comprisescooling fins, and each of the cooling fins is located between twobattery cells adjacent to each other among the plurality of batterycells, and where upper and lower surfaces and both side surfaces of thebattery cell stack included in the battery module comprise exposedareas.

The battery module may further comprise an adhesive layer locatedbetween each of the cooling fins and the battery cell adjacent thereto,and the both side surfaces of the cooling fin may be fixed to thebattery cell by the adhesive layer. The adhesive layer may include atleast one stripe-shaped adhesive portion, and the adhesive portion mayextend in a direction perpendicular to the stacking direction of thebattery cell stack. The battery module may further comprise a fixingmember located at an end portion of the battery cell stack. The fixingmember may surround four surfaces of the battery cell stack. The fixingmember may be arranged along the end portion of the battery cell spacedapart from the adhesive layer. The cooling fin is a plate materialincluding aluminum.

Advantageous Effects

According to the embodiments of the present disclosure, the batterymodule in which at least a part of the outer surface of the battery cellstack is exposed can be mounted on the pack housing, and the batterymodule includes a cooling fin located between at least two battery cellsadjacent to each other of the battery cell stack, thereby capable ofreducing a temperature difference between battery cells in a batterycell stack included in the battery module.

The effects of the present disclosure are not limited to the effectsmentioned above and additional other effects not described above will beclearly understood from the description of the appended claims by thoseskilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of a battery module in a relatedart.

FIG. 2 is a perspective view showing a state in which the componentsconstituting the battery module of FIG. 1 are combined.

FIG. 3 is a cross-sectional view taken along the cutting line A-A ofFIG. 2 .

FIG. 4 is an exploded perspective view of a battery module according toan embodiment of the present disclosure.

FIG. 5 is a perspective view showing a state in which the componentsconstituting the battery module of FIG. 4 are combined.

FIG. 6 is a cross-sectional view taken along the cutting line B-B ofFIG. 5 .

FIG. 7 is a cross-sectional view taken along the cutting line B-B ofFIG. 5 according to another embodiment of the present disclosure.

FIG. 8 is a perspective view illustrating a state before the batterymodule of FIG. 5 is coupled to a pack housing.

FIG. 9 is a perspective view illustrating a state in which the batterymodule of FIG. 5 is coupled to a pack housing.

FIG. 10 is a cross-sectional view of area B of FIG. 9 taken along thecutting line C-C.

FIG. 11 is an exploded perspective view of a battery module according toa comparative example.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Hereinafter, various embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings so thatthose skilled in the art can easily implement them. The presentdisclosure may be modified in various different ways, and is not limitedto the embodiments set forth herein.

Portions that are irrelevant to the description will be omitted toclearly describe the present disclosure, and like reference numeralsdesignate like elements throughout the specification.

Further, in the figures, the size and thickness of each element arearbitrarily illustrated for convenience of description, and the presentdisclosure is not necessarily limited to those illustrated in thefigures. In the figures, the thickness of layers, areas, etc. areexaggerated for clarity. In the figures, for convenience of description,the thicknesses of some layers and areas are shown to be exaggerated.

Further, throughout the specification, when a portion is referred to as“including” a certain component, it means that the portion can furtherinclude other components, without excluding the other components, unlessotherwise stated.

Further, throughout the specification, when referred to as “planar”, itmeans when a target portion is viewed from the upper side, and whenreferred to as “cross-sectional”, it means when a target portion isviewed from the side of a cross section cut vertically.

In the following, the battery pack according to an embodiment of thepresent disclosure will be described. However, the description herein ismade based on the front surface of the front and rear surfaces of thebattery pack, without being limited thereto, and even in the case of therear surface, the same or similar contents may be described.

FIG. 4 is an exploded perspective view of a battery module according toan embodiment of the present disclosure. FIG. 5 is a perspective viewshowing a state in which the components constituting the battery moduleof FIG. 4 are combined. FIG. 6 is a cross-sectional view taken along thecutting line B-B of FIG. 5 .

Referring to FIGS. 4 and 5 , the battery module 100 according to oneembodiment of the present embodiment includes a battery cell stack 120that is stacked in a first direction (y-axis), bus bars 130 located atthe front surface and the rear surface of the battery cell stack 120,respectively, and fixing members 300 located at both end portions of thebattery cell stack 120.

Referring to FIGS. 4 and 5 , the battery module 100 according to thepresent embodiment may include a first area in which at least a part ofthe outer surface of the battery cell stack 120 is exposed. Such firstarea may be an area (A1) in which the upper and lower surfaces and bothside surfaces of the battery cell stack 120 are exposed, except for anarea in which the fixing member 300 is located in the battery cell stack120, as shown in FIG. 6 . That is, referring to FIGS. 5 and 6 , thefirst area A1 may be an area where the battery cell stack 120 is exposedwithout a module frame in the battery module 100. That is, as thebattery module 100 according to the present embodiment includes thefirst area A1, it may have a module frame-less structure in which thebattery cell stack 120 is exposed without a module frame.

Therefore, the battery module 100 according to the present embodimentincludes the first area A1 and thus, can have a simplified andlightweight structure due to the elimination of a module frame ascompared with a battery module in a related art. Further, the batterymodule 100 according to the present embodiment can increase the densityof the battery cells of the battery cell stack due to the elimination ofthe module frame, thereby further improving the performance of thebattery module 100.

Referring to FIG. 4 , the battery module 100 according to the presentembodiment may include a cooling fin 113 that is located between atleast two battery cells 110 adjacent to each other among the pluralityof battery cells 110 included in the battery cell stack 120. As anexample, the cooling fin 113 may be a plate material of aluminum.However, the cooling fin 113 is not limited to an aluminum material, andcan be used without limitation as long as it is a metal material havinga high thermal conductivity. Therefore, the cooling fin 113 correspondsto a lightweight material and thus, the battery module 100 of thepresent embodiment may improve the cooling performance of the batterycell 110 without an issue of weight increase.

Further, the battery module 100 may further include at least oneadhesive layer 115 between the battery cell 110 and the cooling fin 113.Thereby, both side surfaces of the cooling fins 113 may be fixed betweenat least two battery cells 110 adjacent to each other. As an example,the adhesive layer 115 may be formed by an adhesive member such as adouble-sided tape or an adhesive. However, the adhesive layer 115 is notlimited to the above-mentioned contents, and can be used withoutlimitation as long as it is a material having adhesive propertiescapable of fixing the battery cell 110 and the cooling fin 113 to eachother. Thereby, in the battery module 100 of the present embodiment, thebattery cell 110 and the cooling fin 113 can be adhered to each otherwith the adhesive layer 115 and thus, the rigidity and energy density ofthe battery cell stack 120 in the first direction (y-axis) can beenhanced.

The adhesive layer 115 according to the present embodiment may includeat least one stripe-shaped adhesive portion. As shown in FIG. 4 , thetwo adhesive portions may extend long in parallel with each other. Theadhesive portion may extend long in a direction perpendicular to adirection in which the battery cell stack 120 is stacked.

Further, referring to FIGS. 4 and 5 , fixing members 300 located at bothend portions of the battery cell stack 120 may surround four surfaces ofthe battery cell stack 120. The fixing member 300 may be arranged alongthe end portion of the battery cell 110 spaced apart from the adhesivelayer 115. As an example, the fixing member 300 may be an elastic membersuch as a holding band, but is not limited thereto. Thereby, the fixingmember 300 may prevent the phenomenon of being relatively pushed betweenthe plurality of battery cells 110 of the battery cell stack 120. Inaddition, the fixing member 300 may assist in adhering the battery cell110 and the cooling fin 113 to each other.

FIG. 7 is a cross-sectional view taken along the cutting line B-B ofFIG. 5 according to another embodiment of the present disclosure.

Referring again to FIGS. 5 and 6 , in the battery module 100 accordingto the present embodiment, the cooling fins 113 may be located betweenmutually adjacent battery cells 110 that are arranged at regularintervals among the plurality of battery cells 110 of the battery cellstack 120. Further, the cooling fins 113 may be located between thebattery cells 110 adjacent to each other among the plurality of batterycells 110 of the battery cell stack 120. Referring to FIG. 3 , thebattery module 10 in a related art is configured such that heatgenerated from the battery cells 11 is transferred to the lower portionof the battery cells 11, and then transferred to the outside through thethermally conductive resin layer 31 and the bottom portion of the lowerframe 30. In contrast, the battery module 100 according to the presentembodiment is configured such that heat generated from the battery cells110 is directly transferred to the cooling fins 113, and as will bedescribed later, the heat of the cooling fins 113 and/or the batterycells 110 can be immediately transferred to the thermally conductiveresin layer 1315 formed on the lower pack housing 1300 of FIG. 8 .Therefore, the battery module 100 in the present embodiment can moreefficiently and quickly transfer heat generated from the battery cells110 to the outside. In addition, the cooling deviation depending on theposition of the battery cell 110 may be reduced.

Referring to FIGS. 5 and 7 , in the battery module 100 of the presentembodiment, many more cooling fins 113 may be arranged at the two sidescompared with the central portion of the battery cell stack 120. Thatis, the density of the cooling fins 113 formed in the outer peripheralportion of the battery cell stack 120 may be higher than the density ofthe cooling fins 113 formed in the central portion of the battery cellstack 120. Referring to FIG. 3 , in the battery module 10 in a relatedart, as the position of the battery cell 11 is closer to the outermostportion, heat transfer is performed well and thus, the cooling deviationoccurs. In contrast, in the battery module 100 of the presentembodiment, as the cooling fins 113 are located in consideration of theposition of the battery cells 110, the cooling deviations depending onthe position of the battery cells 110 may be further reduced. Further,in consideration of the position of the battery cells 110, the coolingfins 113 may not be located between the battery cells 110 adjacent toeach other and thus, the energy density of the battery cell stack 120may be further improved.

FIG. 8 is a perspective view illustrating a state before the batterymodule of FIG. 5 is coupled to a pack housing. FIG. 9 is a perspectiveview illustrating a state in which the battery module of FIG. 5 iscoupled to a pack housing. FIG. 10 is a cross-sectional view of area Bof FIG. 9 taken along the cutting line C-C.

Referring to FIGS. 8 and 9 , the battery pack 1000 according to thisembodiment includes a lower pack housing 1300 including a plurality ofmodule regions 1310 in which a plurality of battery modules 100 arerespectively mounted, and an upper pack housing 1400 that covers theupper portion of the plurality of module regions 1310.

In the lower pack housing 1300 of the battery pack 1000 according to thepresent embodiment, the module region 1310 may have a size correspondingto the size of the battery module 100. Further, a plurality of partitionwalls 1350 may be located between the plurality of module regions 1310,and among the battery cells 110 included in the battery cell stack 120of the battery module 100, the outermost surface of the battery cell 110and the partition wall 1350 may face each other. Therefore, thepartition wall 1350 can protect the battery module 100 from externalimpact while dividing the area in which the battery module 100 ismounted.

Further, referring to FIG. 10 , a side plate 119 may be included betweenthe battery module 100 and the partition wall 1350. As described inFIGS. 6 and 7 , the side plate 119 may face a side surface of thebattery cell 110 in the first area A1 where the battery cell stack 120is exposed. The side plate 119 may be attached to at least one of theside surface of the battery cell 110 and the partition wall 1350 in thebattery cell stack 120. As an example, the side plate may be a platemanufactured by an injection method, or a plate made of a rubbermaterial, but is not limited thereto. Thereby, the side plate 119 mayadditionally prevent damage to the battery module 100.

Referring to FIGS. 8 and 10 , in the lower pack housing 1300 of thebattery pack 1000 according to the present embodiment, a thermallyconductive resin layer 1315 may be located in each of the module regions1310. The thermally conductive resin layer 1315 may be formed byapplying a thermally conductive resin to the module region 1310 of thelower pack housing 1300 and curing the thermally conductive resin.

As described in FIGS. 6 and 7 , in the first area A1 where the batterycell stack 120 is exposed, at least a part of the lower end portion ofthe battery cell 110 and the lower end portion of the cooling fin 113may directly contact the thermally conductive resin layer 1315. Inaddition, an area in contact with the thermally conductive resin layer1315 in the first area A1 may be a second area in which the lowersurface of the battery cell stack 120 is exposed.

In the battery pack 1000 according to the present embodiment, thebattery module 100 can be mounted in the module region 1310 before thethermally conductive resin for forming the thermally conductive resinlayer 1315 is cured. In the battery pack 1000, the end portion of thecooling fin 113, the lower surface of the battery cell stack 120 and thethermally conductive resin layer 1315 may be in close contact with eachother. The end portion of the cooling fin 113 and the lower surface ofthe battery cell stack 120 may face the thermally conductive resin layer1315. Referring to FIG. 8 , the direction (z-axis) in which the endportion of the cooling fin 113 and the lower surface of the battery cellstack 120 face the thermally conductive resin layer 1315 may be mutuallyperpendicular to the direction (x-axis) in which the battery cells 110are stacked. In addition, as the thermally conductive resin of thethermally conductive resin layer 1315 is cured, the end portion of thecooling fin 113 and the second area A2 may be fixed to the thermallyconductive resin layer 1315 formed on the lower pack housing 1300 of thebattery pack 1000.

Further, referring to FIG. 3 , the battery module 10 in a related art iscooled as heat generated from the battery cells 11 is transferred in theorder of the battery cell 11, the thermally conductive resin layer 31,the lower frame 30, and the heat sink (not shown). In this case, as thelower frame 30 is located between the thermally conductive resin layer31 and the heat sink (not shown), the lower frame 30 may prevent heatgenerated from the battery cells 11 from being transferred to theoutside. In contrast, in the battery pack 1000 of this embodiment, thelower portion of the battery cells 110 is in contact with the thermallyconductive resin layer 1315 and thus, heat generated from the batterycells 110 of the battery module 100 may be directly transferred to thethermally conductive resin layer 1315. Thereby, the battery pack 1000 ofthe present embodiment can quickly transfer the heat generated from thebattery cell 110 to the outside as compared with the one in a relatedart.

In addition to the above, in the battery pack 1000 of the presentembodiment, when the battery module 100 includes the cooling fins 113between the battery cells 110 adjacent to each other, heat generatedfrom the battery cell 110 of the battery module 100 can be immediatelytransferred from the inside to the cooling fin 113, and then directlytransferred to the thermally conductive resin layer 1315 in contact withthe cooling fins 113. Thereby, the battery pack 1000 of the presentembodiment can more efficiently and quickly transfer heat generated fromthe battery cells 110 to the outside. In addition, the cooling deviationdepending on the position of the battery cell 110 may be reduced.

FIG. 11 is an exploded perspective view of a battery module according toa comparative example. Referring to FIG. 11 , the conventional batterymodule 50 includes a battery cell stack 52 in which a plurality ofbattery cells are stacked, a module frame 60 for housing the batterycell stack 52, end plates 55 for covering the front and rear surfaces ofthe battery cell stack 52, and busbar frames 53 formed between the endplates 55 and the front and rear surfaces of the battery cell stack 52.Further, the conventional battery module 50 includes a cooling fin 70 incontact with the side surface of the battery cell stack 52, and furtherincludes a fixing bolt 71, a fixing hole 73, and a fixing frame 79 forfixing the cooling fin 70 to the battery module 50. Therefore, theconventional battery module 50 may transfer heat generated in thebattery cell stack 52 to the outside of the battery module 50 throughthe cooling fins 70.

However, in the case of the conventional battery module 50, an attemptwas made to improve the cooling performance by including the coolingfins 70 in the battery module 50, but the capacity of the battery cellcannot be secured, because much of the space is occupied by the fixingbolt 71, the fixing hole 73, and the fixing frame 79 for fixing thecooling fin 70 to the battery module 50, and this also causes a problemthat the capacity competitiveness per volume and the pricecompetitiveness due to additional components are lowered.

In contrast, referring to FIGS. 4 to 10 , the battery pack 1000 of thepresent embodiment includes the cooling fins 113 between the batterycells 110 adjacent to each other among the plurality of battery cells110 of the battery cell stack 120 in the battery module 100, andthereby, can be fixed inside the battery cell stack 120 without a fixingstructure (fixing bolt 71, fixing hole 73, fixing frame 79) as in theconventional battery module 50. Accordingly, the embodiment of thepresent disclosure can improve the cooling performance of the batterymodule 100 in a time-and cost-effective manner through a relativelysimplified process.

Meanwhile, the battery pack according to the embodiment of the presentdisclosure can applied to various devices. These devices may be appliedto transportation means such as an electric bicycle, an electricvehicle, a hybrid vehicle, but the present disclosure is not limitedthereto, and can be applied to various devices that can use the batterymodule and the battery pack including the same, which also belongs tothe scope of the present disclosure.

Although the preferred embodiments of the present disclosure have beendescribed in detail above, the scope of the present disclosure is notlimited thereto, and various modifications and improvements of thoseskilled in the art using the basic concepts of the present disclosuredefined in the following claims also belong to the scope of rights.

DESCRIPTION OF REFERENCE NUMERALS

100: battery module

110: battery cell

113: cooling fin

115: adhesive layer

120: battery cell stack

300: fixing member

1000: battery pack

1. A battery pack, comprising: a lower pack housing including a plurality of module regions; a thermally conductive resin layer located -in each of the plurality of module regions; a battery module mounted on each of the plurality of module regions and located on the thermally conductive resin layer; and an upper pack housing for covering the battery module, wherein the battery module comprises a battery cell stack having a plurality of battery cells, and the battery cell stack directly faces the thermally conductive resin layer, wherein the battery cell stack comprises cooling fins, and each of the cooling fins is located between two battery cells adjacent to each other among the plurality of battery cells, and wherein the end portion of the cooling fin comes into contact with the thermally conductive resin layer.
 2. The battery pack according to claim 1, wherein upper and lower surfaces and both side surfaces of the battery cell stack included in the battery module comprises exposed areas, and wherein the lower surface of the battery cell stack among the exposed areas faces the thermally conductive resin layer, and a direction in which the lower surface of the battery cell stack faces the thermally conductive resin layer, and a direction in which the battery cells are stacked are perpendicular to each other.
 3. The battery pack according to claim 1, wherein the battery module further comprises an adhesive layer located between each of the cooling fins and the battery cell adjacent thereto, and wherein the both side surfaces of the cooling fin are fixed to the battery cell by the adhesive layer.
 4. The battery pack according to claim 3, wherein the adhesive layer comprises at least one stripe-shaped adhesive portion, and the adhesive portion extends in a direction perpendicular to the stacking direction of the battery cell stack.
 5. The battery pack according to claim 3, wherein the end portion of the cooling fin is fixed to the thermally conductive resin layer.
 6. The battery pack according to claim 3, wherein the battery module further comprises a fixing members located at an end portions of the battery cell stack.
 7. The battery pack according to claim 6, wherein the fixing member surrounds four surfaces of the battery cell stack.
 8. The battery pack according to claim 6, wherein the fixing member is arranged along the end portion of the battery cell spaced apart from the adhesive layer.
 9. The battery pack according to claim 1, wherein the cooling fin is a plate material including aluminum.
 10. The battery pack according to claim 1, wherein the battery module is mounted on the thermally conductive resin layer, and the end portion of the cooling fin comes into contact with the upper surface of the thermally conductive resin layer.
 11. The battery pack according to claim 1, further comprising a plurality of partition walls partitioning the plurality of module regions, wherein a surface of an outermost battery cell among the plurality of battery cells included in the battery cell stack and the partition wall face to each other.
 12. The battery pack according to claim 1, wherein the density of the cooling fins formed on the outer peripheral portion of the battery cell stack is higher than the density of the cooling fins formed in the central portion of the battery cell stack.
 13. A device comprising the battery pack of claim
 1. 14. A battery module comprising: a battery cell stack having a plurality of battery cells, wherein the battery cell stack comprises cooling fins, and each of the cooling fins is located between two battery cells adjacent to each other among the plurality of battery cells, and wherein upper and lower surfaces and both side surfaces of the battery cell stack included in the battery module comprise exposed areas.
 15. The battery module according to claim 14, wherein the battery module further comprises an adhesive layer located between each of the cooling fins and the battery cell adjacent thereto, and wherein the both side surfaces of the cooling fin are fixed to the battery cell by the adhesive layer.
 16. The battery module according to claim 15, wherein the adhesive layer comprises at least one stripe-shaped adhesive portion, and the adhesive portion extends in a direction perpendicular to the stacking direction of the battery cell stack.
 17. The battery module according to claim 15, further comprising a fixing member located at an end portion of the battery cell stack.
 18. The battery module according to claim 17, wherein the fixing member surrounds four surfaces of the battery cell stack.
 19. The battery module according to claim 17, wherein the fixing member is arranged along the end portion of the battery cell spaced apart from the adhesive layer.
 20. The battery module according to claim 14, wherein the cooling fin is a plate material including aluminum. 